Here's what rhymes with coextensional.
attentional extensional dimensional intentional conventional unintentional unconventional threedimensional twodimensional multidimensional Words that almost rhyme with coextensional
genital sectional directional sentinel tenable tentacle spendable pentacle bendable terrible exceptional spectacle parable plentiful retinal sensual seminal correctional bearable expendable obsessional testable extendable perceptional complexional medical professional chemical acceptable accessible sensible congenital festival intestinal marital vegetable amenable skeletal skeptical textual commendable confessional dependable pedestal sceptical segmental untenable legible ostensible bidirectional inflectional concessional extensible processional unexceptional wearable amendable breathable conceptional convectional inflexional recessional stretchable weldable spreadable quenchable cerebral flexible clerical perceptual respectable susceptible congressional credible perceptible detectable lamentable unbearable defensible detestable illegible impeccable ineffable polemical trigeminal chimerical delectable digestible execrable expressible presentable preventable unquenchable urogenital contestable dispensable inedible collectible correctable repairable suggestible undependable collectable perfectible preventible suppressible comestible connectable detectible electable connectible numerical hypothetical biochemical heterosexual homosexual inaccessible unacceptable contemptible insensible receptacle impregnable premarital unforgettable unidirectional alchemical compressible geochemical photochemical psychosexual undetectable unprofessional prophetical impressible forgettable premedical recommendable subprofessional unwearable incredible indispensable inflexible inexpressible irrepressible regrettable extramarital histochemical incontestable indefensible indigestible nonprofessional insusceptible paramedical semiprofessional unpreventable noncollectable gastrointestinal comprehensible reprehensible incompressible intertextual anticlerical paraprofessional nonclerical nonnumerical intracerebral physicochemical alphanumerical musculoskeletal immunohistochemical